Frictional locking devices are critical safety devices that keep shafts and other components locked together, using the coefficient of friction between the two contacting surfaces. A primary example is a shaft and hub system, where the friction locking device expands and holds the components in place by friction. Shrink Discs are another type of shaft-hub connection that offer a more powerful alternative to conventional shrink fits, wedge, keyway or polygonal connections. Unlike internal locking devices, such as locking assemblies, the pressure in the shirk disc is applied from the outside to the hollow shaft or hub, thus creating a strong frictionally engaged connection between shaft and hub. In the shrink disc, the torque is transmitted at the joining surface between shaft and hub without an intermediate element, this creating a shrink fit. BSC branches stock a wide range of MAV friction locking devices and shrink discs for different applications. MAV locking devices offer an inference fit with simplified installation and removal. We have MAV shaft-hub connections available in self-centring, non-self-centring and self-locking types, in both standard and imperial sizes. Visit the BSC branches near you to learn more about our friction locking devices and shrink discs.